Our venerable and God-bearing Father Nicodemus of the Holy Mountain (or Nikodemos the Hagiorite) was a great theologian and teacher of the Orthodox Church, reviver of hesychasm, canonist, hagiologist, and writer of liturgical poetry.

He was, however, influenced significantly by Roman Catholic spirituality, canon law, and theology. He translated and edited The Spiritual Combat (1589) by Lorenzo Scupoli, a Catholic priest of Venice, renaming it Unseen Warfare, and the Spiritual Exercises of Ignatius of Loyola, the founder of the Jesuits. He made use of Roman canon law in The Rudder, and held to the Anselmian view of the Atonment. There is an extant letter by St Nicodemus to Bishop Paisios of Stagai requesting an indulgence, and promising financial payment for it. His manual on sacramental confession, the Exomologetarion is a reworking of books by Paulo Segneri, a Roman Catholic author. The influence of Western pietistic moralism is perhaps seen best in his Chrestoethia of Christians (1803), in which he condemns musical instruments, dancing, (non-liturgical) singing, the telling of jokes, etc., and tells Christians that such conduct will lead not only to their own punishment, but to the death of their unborn children.